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                        html常用标签
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                        a标签的使用
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                        表格的介绍
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                        媒体标签
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                        清除样式
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                        css引入方式
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                        css选择符与选择器
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                        css字体样式
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                        图片的调整
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                        伪类选择
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                            <b>2.5.</b>
                        
                        盒子模型
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                            <b>2.6.</b>
                        
                        浮动
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                            <b>2.7.</b>
                        
                        定位
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                            <b>2.8.</b>
                        
                        阴影
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                            <b>2.9.</b>
                        
                        图片溢出处理
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                        动画
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                        动画插件与浏览器内核
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                        旋转菜单
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                            <b>2.13.</b>
                        
                        移动端
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                            <b>2.14.</b>
                        
                        rem布局
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                            <b>2.15.</b>
                        
                        权重问题
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                            <b>2.16.</b>
                        
                        移动端导航问题
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                            <b>2.17.</b>
                        
                        flex布局
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                            <b>2.18.</b>
                        
                        fullpage
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                            <b>2.19.</b>
                        
                        bootstrap
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                            <b>2.20.</b>
                        
                        媒体查询
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                            <b>3.</b>
                        
                        JavaScript的介绍
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                            <b>3.1.</b>
                        
                        JavaScript数据类型
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                            <b>3.2.</b>
                        
                        数据类型的转换
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                            <b>3.3.</b>
                        
                        运算符
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                            <b>3.4.</b>
                        
                        比较运算符
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                            <b>3.5.</b>
                        
                        赋值运算符
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                            <b>3.6.</b>
                        
                        逻辑操作符
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                            <b>3.7.</b>
                        
                        条件语句
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        <li class="chapter " data-level="3.8" data-path="md/js/条件运算符.html">
            
                
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                            <b>3.8.</b>
                        
                        条件运算符
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        <li class="chapter " data-level="3.9" data-path="md/js/位运算符.html">
            
                
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                            <b>3.9.</b>
                        
                        位运算符
                    </a>
            
            
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                            <b>3.10.</b>
                        
                        循环语句
                    </a>
            
            
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        <li class="chapter " data-level="3.11" data-path="md/js/for循环.html">
            
                
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                            <b>3.11.</b>
                        
                        for循环
                    </a>
            
            
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                            <b>3.12.</b>
                        
                        ES6
                    </a>
            
            
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        <li class="chapter " data-level="3.13" data-path="md/js/es6安装.html">
            
                
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                            <b>3.13.</b>
                        
                        ES6安装
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                            <b>3.14.</b>
                        
                        内置对象
                    </a>
            
            
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                            <b>3.15.</b>
                        
                        Array对象
                    </a>
            
            
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        <li class="chapter " data-level="3.16" data-path="md/js/Date对象.html">
            
                
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                            <b>3.16.</b>
                        
                        Date对象
                    </a>
            
            
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                            <b>3.17.</b>
                        
                        布尔值对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.18" data-path="md/js/数学对象.html">
            
                
                    <a href="../../md/js/数学对象.html">
                
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                            <b>3.18.</b>
                        
                        数学对象
                    </a>
            
            
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        <li class="chapter " data-level="3.19" data-path="md/js/对象的创建.html">
            
                
                    <a href="../../md/js/对象的创建.html">
                
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                            <b>3.19.</b>
                        
                        对象的创建
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.20" data-path="md/js/BOM.html">
            
                
                    <a href="../../md/js/BOM.html">
                
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                            <b>3.20.</b>
                        
                        BOM
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.21" data-path="md/js/DOM关于元素的获取.html">
            
                
                    <a href="../../md/js/DOM关于元素的获取.html">
                
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                            <b>3.21.</b>
                        
                        DOM关于元素的获取
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.22" data-path="md/js/DOM元素对象.html">
            
                
                    <a href="../../md/js/DOM元素对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.22.</b>
                        
                        DOM元素对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.23" data-path="md/js/DOM事件练习.html">
            
                
                    <a href="../../md/js/DOM事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.23.</b>
                        
                        DOM事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.24" data-path="md/js/DOM鼠标事件.html">
            
                
                    <a href="../../md/js/DOM鼠标事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.24.</b>
                        
                        DOM鼠标事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.25" data-path="md/js/事件代理.html">
            
                
                    <a href="../../md/js/事件代理.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.25.</b>
                        
                        事件代理
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.26" data-path="md/js/移动端事件.html">
            
                
                    <a href="../../md/js/移动端事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.26.</b>
                        
                        移动端事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.27" data-path="md/js/无缝轮播图.html">
            
                
                    <a href="../../md/js/无缝轮播图.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.27.</b>
                        
                        无缝轮播图
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.28" data-path="md/js/鼠标事件练习.html">
            
                
                    <a href="../../md/js/鼠标事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.28.</b>
                        
                        鼠标事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.29" data-path="md/js/ajax.html">
            
                
                    <a href="../../md/js/ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.29.</b>
                        
                        ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.30" data-path="md/js/封装ajax.html">
            
                
                    <a href="../../md/js/封装ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.30.</b>
                        
                        封装ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.31" data-path="md/js/高德地图的使用.html">
            
                
                    <a href="../../md/js/高德地图的使用.html">
                
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                            <b>3.31.</b>
                        
                        高德地图的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.32" data-path="md/js/预加载插件使用.html">
            
                
                    <a href="../../md/js/预加载插件使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.32.</b>
                        
                        预加载插件使用
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="4" data-path="md/jQuery/JQ变量的声明.html">
            
                
                    <a href="../../md/jQuery/JQ变量的声明.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.</b>
                        
                        JQ变量的声明
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="4.1" data-path="md/jQuery/选择器和效果.html">
            
                
                    <a href="../../md/jQuery/选择器和效果.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.1.</b>
                        
                        选择器和效果
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.2" data-path="md/jQuery/属性.html">
            
                
                    <a href="../../md/jQuery/属性.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.2.</b>
                        
                        属性
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.3" data-path="md/jQuery/尺寸.html">
            
                
                    <a href="../../md/jQuery/尺寸.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.3.</b>
                        
                        尺寸
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.4" data-path="md/jQuery/遍历.html">
            
                
                    <a href="../../md/jQuery/遍历.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.4.</b>
                        
                        遍历
                    </a>
            
            
        </li>
    
        <li class="chapter active" data-level="4.5" data-path="md/jQuery/正则表达式.html">
            
                
                    <a href="../../md/jQuery/正则表达式.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.5.</b>
                        
                        正则表达式
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.6" data-path="md/jQuery/jQuery事件练习.html">
            
                
                    <a href="../../md/jQuery/jQuery事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.6.</b>
                        
                        jQuery事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.7" data-path="md/jQuery/操作.html">
            
                
                    <a href="../../md/jQuery/操作.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.7.</b>
                        
                        操作
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.8" data-path="md/jQuery/事件.html">
            
                
                    <a href="../../md/jQuery/事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.8.</b>
                        
                        事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.9" data-path="md/jQuery/ajax.html">
            
                
                    <a href="../../md/jQuery/ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.9.</b>
                        
                        ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.10" data-path="md/jQuery/三级联动.html">
            
                
                    <a href="../../md/jQuery/三级联动.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.10.</b>
                        
                        三级联动
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.11" data-path="md/jQuery/滚动监听导航效果.html">
            
                
                    <a href="../../md/jQuery/滚动监听导航效果.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.11.</b>
                        
                        滚动监听导航效果
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.12" data-path="md/jQuery/悬停导航.html">
            
                
                    <a href="../../md/jQuery/悬停导航.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.12.</b>
                        
                        悬停导航
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="5" data-path="md/Vue/修饰符与条件渲染.html">
            
                
                    <a href="../../md/Vue/修饰符与条件渲染.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.</b>
                        
                        Vue修饰符与条件渲染
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="5.1" data-path="md/Vue/绑定class和style.html">
            
                
                    <a href="../../md/Vue/绑定class和style.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.1.</b>
                        
                        绑定class和style
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.2" data-path="md/Vue/排序.html">
            
                
                    <a href="../../md/Vue/排序.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.2.</b>
                        
                        排序
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.3" data-path="md/Vue/表单输入绑定.html">
            
                
                    <a href="../../md/Vue/表单输入绑定.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.3.</b>
                        
                        表单输入绑定
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.4" data-path="md/Vue/生命周期.html">
            
                
                    <a href="../../md/Vue/生命周期.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.4.</b>
                        
                        生命周期
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.5" data-path="md/Vue/自定义指令.html">
            
                
                    <a href="../../md/Vue/自定义指令.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.5.</b>
                        
                        自定义指令
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.6" data-path="md/Vue/组件.html">
            
                
                    <a href="../../md/Vue/组件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.6.</b>
                        
                        组件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.7" data-path="md/Vue/Vue事件练习.html">
            
                
                    <a href="../../md/Vue/Vue事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.7.</b>
                        
                        Vue事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.8" data-path="md/Vue/动态模板.html">
            
                
                    <a href="../../md/Vue/动态模板.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.8.</b>
                        
                        动态模板
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.9" data-path="md/Vue/插槽的使用.html">
            
                
                    <a href="../../md/Vue/插槽的使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.9.</b>
                        
                        插槽的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.10" data-path="md/Vue/router.html">
            
                
                    <a href="../../md/Vue/router.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.10.</b>
                        
                        router
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.11" data-path="md/Vue/ajax与框架搭建.html">
            
                
                    <a href="../../md/Vue/ajax与框架搭建.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.11.</b>
                        
                        ajax与框架搭建
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.12" data-path="md/Vue/store.html">
            
                
                    <a href="../../md/Vue/store.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.12.</b>
                        
                        store
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.13" data-path="md/Vue/ref获取元素.html">
            
                
                    <a href="../../md/Vue/ref获取元素.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.13.</b>
                        
                        ref获取元素
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="6" data-path="md/wx/小程序.html">
            
                
                    <a href="../../md/wx/小程序.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.</b>
                        
                        小程序
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="6.1" data-path="md/wx/封装外部ajax路径.html">
            
                
                    <a href="../../md/wx/封装外部ajax路径.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.1.</b>
                        
                        封装外部ajax路径
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="6.2" data-path="md/wx/练习.html">
            
                
                    <a href="../../md/wx/练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.2.</b>
                        
                        练习
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="7" data-path="md/Egret/canvas.html">
            
                
                    <a href="../../md/Egret/canvas.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.</b>
                        
                        canvas
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="7.1" data-path="md/Egret/async.html">
            
                
                    <a href="../../md/Egret/async.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.1.</b>
                        
                        async
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.2" data-path="md/Egret/显示对象与容器.html">
            
                
                    <a href="../../md/Egret/显示对象与容器.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.2.</b>
                        
                        显示对象与容器
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.3" data-path="md/Egret/01.基础.html">
            
                
                    <a href="../../md/Egret/01.基础.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.3.</b>
                        
                        01.基础
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.4" data-path="md/Egret/02.对象池.html">
            
                
                    <a href="../../md/Egret/02.对象池.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.4.</b>
                        
                        02.对象池
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.5" data-path="md/Egret/03.typeScript.html">
            
                
                    <a href="../../md/Egret/03.typeScript.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.5.</b>
                        
                        03.typeScript
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.6" data-path="md/Egret/04.场景管理类.html">
            
                
                    <a href="../../md/Egret/04.场景管理类.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.6.</b>
                        
                        04.场景管理类
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="8" data-path="gitbook的安装.html">
            
                
                    <a href="../../gitbook的安装.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.</b>
                        
                        gitbook的安装
                    </a>
            
            
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            <li class="divider"></li>
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                <a href="https://www.gitbook.com" target="blank" class="gitbook-link">
                    Published with GitBook
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    <div class="book-body">
        <div class="body-inner">
            <div class="book-header" role="navigation">
    <!-- Actions Left -->
    

    <!-- Title -->
    <h1>
        <i class="fa fa-circle-o-notch fa-spin"></i>
        <a href="../../" >个人笔记</a>
    </h1>
</div>

            <div class="page-wrapper" tabindex="-1" role="main">
                <div class="page-inner">
                
                
                    <section class="normal" id="section-">
                    
                        <h1 id="&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;">&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;</h1>
<p>&#x7528;&#x6765;&#x5339;&#x914D;&#x4E00;&#x7C7B;&#x6570;&#x636E;&#x7684;&#x6A21;&#x5F0F;</p>
<p>&#x8BED;&#x6CD5;&#xFF1A;</p>
<p> 1&#x3001;new RegExp(n)</p>
<p>n&#xFF1A;&#x8868;&#x793A;&#x9700;&#x8981;&#x5339;&#x914D;&#x7684;&#x6A21;&#x5F0F;</p>
<p>2&#x3001;/n/</p>
<p>n&#xFF1A;&#x8868;&#x793A;&#x9700;&#x8981;&#x5339;&#x914D;&#x7684;&#x6A21;&#x5F0F;</p>
<pre><code>            var reg1 = new RegExp(&quot;a&quot;);
            //^&#xFF0C;&#x8868;&#x793A;&#x5339;&#x914D;&#x4EE5;&#x4EC0;&#x4E48;&#x5F00;&#x5934;
            //$,&#x8868;&#x793A;&#x5339;&#x914D;&#x4EE5;&#x4EC0;&#x4E48;&#x7ED3;&#x5C3E;&#x7684;&#x5B57;&#x7B26;&#x4E32;
            var reg2 = /^a$/;
            console.log(reg1);
            var str =  &quot;bacd&quot;;
            console.log(reg1.test(str));//true
            console.log(reg2.test(str))//false
            var str1 = &quot;bcd&quot;;
            console.log(reg2.test(str1));//false
            var str2 = &quot;abda&quot;;
            console.log(reg2.test(str2));//false

            var reg =/[0-9]/;
            var str = &quot;123&quot;;
            console.log(reg.test(str));//true
            var reg =/^[0-9]$/;
            var str1 = &quot;123&quot;;
            console.log(reg.test(str1));//false

            //&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x56DB;&#x4F4D;&#x6570;&#x7684;&#x9A8C;&#x8BC1;&#x7801;
            // | &#x8868;&#x793A;&#x6216;
            var reg = /^[0-9][0-9][0-9][0-9]$/
            var reg1 = /^[0|9][0-9][0-9][0-9]$/
            var str =&quot;1234&quot;;
            console.log(reg.test(str));//true
            console.log(reg1.test(str));//45
            var str1 =&quot;12346&quot;;
            console.log(reg.test(str1));//false

            //&#x5339;&#x914D;&#x624B;&#x673A;&#x53F7;&#x7801;
            var reg = /^1[3-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/;
            var str = &quot;13124974377&quot;;
            console.log(reg.test(str));//true
```

#&#x65B9;&#x62EC;&#x53F7;

 &#x7528;&#x4E8E;&#x5339;&#x914D;&#x67D0;&#x4E2A;&#x8303;&#x56F4;&#x5185;&#x7684;&#x5B57;&#x7B26;

 [0-9]:&#x6570;&#x503C;&#x7C7B;&#x578B;

[a-zA-Z]:&#x5B57;&#x6BCD;&#x7C7B;&#x578B;

 [a-z]:&#x5C0F;&#x5199;

 [A-Z]:&#x5927;&#x5199;&#x5B57;&#x6BCD;

 [^a-z]:&#x9664;&#x4E86;&#x5C0F;&#x5199;&#x5B57;&#x6BCD;&#x4E4B;&#x5916;&#x7684;&#x5B57;&#x7B26; =&gt; ^&#x7B26;&#x53F7;&#x5728;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x8868;&#x793A;&#x975E;&#x3002;
```
            var reg =/^[^a-z]$/;
            var str =&quot;a&quot;;
            console.log(reg.test(str));//false
            var str1 =&quot;1&quot;;
            console.log(reg.test(str1));//true

            var str = &quot;&#x4ECA;&#x5929;&#x7684;&#x5929;&#x6C14;&#x771F;&#x597D;&#xFF01;&quot;;
             var nstr = str.replace(&quot;&#x5929;&quot;,&quot;&#x65E5;&quot;);
            console.log(nstr);
```
# &#x4FEE;&#x9970;&#x7B26;

 i&#xFF1A;&#x4E0D;&#x533A;&#x5206;&#x5927;&#x5C0F;&#x5199;

m&#xFF1A;&#x8BC6;&#x522B;&#x6362;&#x884C;&#x7B26;

 g&#xFF1A;&#x4EE3;&#x8868;&#x5168;&#x5C40;&#x5339;&#x914D;
```
            var str2 = str.replace(/&#x5929;/g,&quot;&#x65E5;&quot;);
            console.log(str2);
            var str = &quot;hello worLd&quot;;
            console.log(str.replace(/l/ig,&quot;z&quot;));//hezzo worzd
```

# &#x5143;&#x5B57;&#x7B26;
               &#x76F8;&#x5F53;&#x4E8E;
                &#x2193;
 \d&#xFF1A;&#x8868;&#x793A;&#x4E00;&#x4E2A;&#x6570;&#x5B57; =&gt; [0-9]

 \D:&#x8868;&#x793A;&#x975E;&#x6570;&#x5B57;     =&gt; [^0-9]

\w &#x5355;&#x8BCD;&#x5B57;&#x7B26;     =&gt; [a-zA-Z0-9_]

 \W &#x975E;&#x5355;&#x8BCD;&#x5B57;&#x7B26;    =&gt; [^a-zA-Z0-9_]

 \s &#x67E5;&#x627E;&#x4E00;&#x4E2A;&#x7A7A;&#x767D;&#x5B57;&#x7B26;(&#x6BD4;&#x5982;&#x7A7A;&#x683C;&#xFF0C;&#x6362;&#x884C;&#x7B26;....&#x8FD9;&#x4E9B;&#x770B;&#x4E0D;&#x89C1;&#x7684;&#x7B26;&#x53F7;)

 \S &#x975E;&#x7A7A;&#x767D;&#x5B57;&#x7B26;

 \b &#x5355;&#x8BCD;&#x8FB9;&#x754C;

 \B &#x975E;&#x5355;&#x8BCD;&#x8FB9;&#x754C;

. &#x8868;&#x793A;&#x4EFB;&#x610F;&#x5B57;&#x7B26;&#xFF0C;&#x9664;&#x4E86;&#x6362;&#x884C;&#x7B26;(\n),&#x7ED3;&#x675F;&#x7B26;(\r); 
```
            var reg = /\d/;
            var str = &quot;1234&quot;;
            console.log(reg.test(str));//true

            var reg =/\D/;//&#x53EA;&#x6709;&#x5B58;&#x5728;&#x4E00;&#x4E2A;&#x975E;&#x6570;&#x503C;&#x7C7B;&#x578B;&#x5B57;&#x7B26;&#xFF0C;&#x5219;&#x8FD4;&#x56DE;true
            var str = &quot;1zs&quot;;
            console.log(reg.test(str));

            var reg = /\w/;
            var str1 = &quot;&#x5929;&quot;;
            console.log(reg.test(str));//true
            console.log(reg.test(str1));//false

            var str = &quot; &quot;;
            var reg = /\s/;
            if(reg.test(str)){
                console.log(&quot;&#x8BF7;&#x4E0D;&#x8981;&#x8F93;&#x5165;&#x7A7A;&#x683C;&quot;);
            }

            var str = &quot;hwow old are you&#xFF1F;&quot;;
            var reg = /w\b/;//&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x5728;&#x5355;&#x8BCD;&#x53F3;&#x8FB9;&#x754C;&#x4E0A;&#x7684;w
            console.log(str.match(reg));//[&quot;w&quot;, index: 3, input: &quot;hwow old are you&#xFF1F;&quot;, groups: undefined]
            console.log(str.replace(/w\b/,&quot;W&quot;))//hwoW old are you&#xFF1F;

            var str = &quot;hell! how old are youh&#xFF1F; what?&quot;;
            var reg = /\bh/g;//&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x5728;&#x5355;&#x8BCD;&#x5DE6;&#x8FB9;&#x754C;&#x4E0A;&#x7684;h
            console.log(str.replace(reg,&quot;H&quot;));//Hell! How old are you&#xFF1F; what?
            console.log(str.replace(/\Bh\B/g,&quot;H&quot;));//hell! how old are youh&#xFF1F; wHat?

            var reg = /./;
            var srt1 = &quot;12fadad&#x662F;&quot;;
            var str2 = &quot;\n&quot;;
            var str3 = &quot;\r&#x5566;&#x5566;&#x5566;&#x5566;&quot;;
            console.log(reg.test(str1));//true
            console.log(reg.test(str2));//false
            console.log(reg.test(str3));//true
</code></pre><h1 id="&#x91CF;&#x8BCD;">&#x91CF;&#x8BCD;</h1>
<p> {n}&#x8868;&#x793A;&#x6709;n&#x4E2A;</p>
<p>{n,m}&#x8868;&#x793A;&#x6709;n~m&#x4E2A;</p>
<p> {n,}&#x8868;&#x793A;&#x5927;&#x4E8E;&#x7B49;&#x4E8E;n&#x4E2A;</p>
<p>?  &#x8868;&#x793A;0&#x4E2A;&#x6216;&#x4E00;&#x4E2A; =&gt;{0,1}</p>
<ul>
<li>&#x8868;&#x793A;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A; =&gt;{1,}</li>
</ul>
<p>&#x8868;&#x793A;0&#x4E2A;&#x6216;&#x591A;&#x4E2A; =&gt;{0,}</p>
<pre><code>            //&#x5339;&#x914D;&#x624B;&#x673A;&#x53F7;&#x7801;
            var reg = /^1[3-9]\d{9}$/;
            var str =&quot;13265973117&quot;;
            console.log(reg.test(str));//true
            var reg = /^\d{4,6}$/;
            var str1=&quot;1234&quot;;
            console.log(reg.test(str1));//true
            var reg =/^\d{6,}$/;
            var str = &quot;12345&quot;;
            console.log(reg.test(str));//false
            var reg = /^\d.?$/;//&#x8868;&#x793A;&#x5339;&#x914D;&#x6570;&#x5B57;&#x540E;&#x9762;&#x8DDF;&#x7740;&#x4E00;&#x4E2A;&#x6216;&#x8005;0&#x4E2A;&#x4EFB;&#x610F;&#x5B57;&#x7B26;
            var str = &quot;11&quot;;
            console.log(reg.test(str));//true
            var reg = /^\d+$/;//&#x8868;&#x793A;&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A;&#x6570;&#x5B57;
            var str = &quot;122&quot;;
            console.log(reg.test(str));//true
            var reg = /^.*$/;//&#x8868;&#x793A;&#x5339;&#x914D;0&#x6216;&#x591A;&#x4E2A;&#x5B57;&#x7B26;
            var str = &quot;3345bv&quot;;
            console.log(reg.test(str));//true
</code></pre><h1 id="&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x7684;&#x65B9;&#x6CD5;">&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x7684;&#x65B9;&#x6CD5;</h1>
<p> 1&#x3001;test()&#x7528;&#x6765;&#x5339;&#x914D;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x4E2D;&#x6307;&#x5B9A;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x8FD4;&#x56DE;&#x5E03;&#x5C14;&#x503C;&#x3002;</p>
<p>2&#x3001;exec()&#x5339;&#x914D;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x6307;&#x5B9A;&#x7684;&#x503C;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x8BE5;&#x5B57;&#x7B26;&#x548C;&#x8BE5;&#x5B57;&#x7B26;&#x6240;&#x5728;&#x7684;&#x4E0B;&#x6807;&#x503C;&#x3002;</p>
<p>&#x6CE8;&#x610F;&#xFF1A;&#x8BE5;&#x65B9;&#x6CD5;&#x53EA;&#x80FD;&#x5339;&#x914D;&#x4E00;&#x6B21;&#x53EA;&#x80FD;&#x83B7;&#x53D6;&#x5230;&#x7B2C;&#x4E00;&#x4E2A;&#x76EE;&#x6807;&#x5B57;&#x7B26;</p>
<p>&#x5982;&#x679C;&#x8981;&#x5339;&#x914D;&#x5230;&#x6240;&#x6709;&#x5B57;&#x7B26;&#xFF0C;&#x9700;&#x8981;&#x5168;&#x5C40;&#x5339;&#x914D;&#x7136;&#x540E;&#x5728;&#x8FDB;&#x884C;&#x591A;&#x6B21;&#x5339;&#x914D;&#xFF0C;&#x5C31;&#x80FD;&#x540E;&#x83B7;&#x53D6;&#x5230;&#x6240;&#x6709;&#x76EE;&#x6807;&#x5B57;&#x7B26;&#x3002;</p>
<p>&#x4F8B;&#x5982;</p>
<pre><code>var str = &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;&#xFF01;&quot;;
var reg = /&#x5929;/g;
console.log(reg.exec(str));//&quot;&#x5929;&quot;, index: 1, input: &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;&#xFF01;&quot;
console.log(reg.exec(str));//&quot;&#x5929;&quot;, index: 2, input: &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;&#xFF01;&quot;
</code></pre><p>3&#x3001;toString(),&#x4E0D;&#x662F;&#x7528;&#x6765;&#x5339;&#x914D;&#x7684;</p>
<p>&#x8FD4;&#x56DE;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x7684;&#x5B57;&#x7B26;&#x4E32;</p>
<pre><code>            var str = &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;&#xFF01;&quot;;
            var reg = /&#x5929;/g;
            console.log(reg.exec(str));
            console.log(reg.exec(str));
            var reg = /&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;/;
            console.log(reg.toString());//  /&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;/
</code></pre><h1 id="&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x5177;&#x6709;&#x6B63;&#x5219;&#x5339;&#x914D;&#x7684;&#x65B9;&#x6CD5;&#xFF1A;">&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x5177;&#x6709;&#x6B63;&#x5219;&#x5339;&#x914D;&#x7684;&#x65B9;&#x6CD5;&#xFF1A;</h1>
<p>1&#x3001;replace()</p>
<p>2&#x3001;match()&#xFF1A;&#x627E;&#x5230;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x7684;&#x5339;&#x914D;, &#x8FD4;&#x56DE;&#x5305;&#x542B;&#x76EE;&#x6807;&#x5B57;&#x7B26;&#x7684;&#x4E00;&#x4E2A;&#x6570;&#x7EC4;</p>
<p>3&#x3001;search()&#xFF1A;&#x68C0;&#x7D22;&#x4E0E;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x76F8;&#x5339;&#x914D;&#x7684;&#x503C;&#x3002;&#x8FD4;&#x56DE;&#x7B2C;&#x4E00;&#x4E2A;&#x51FA;&#x73B0;&#x76EE;&#x6807;&#x5143;&#x7D20;&#x7684;&#x4E0B;&#x6807;&#x503C;</p>
<p> 4&#x3001;split()&#x628A;&#x5B57;&#x7B26;&#x4E32;&#x5206;&#x5272;&#x4E3A;&#x5B57;&#x7B26;&#x4E32;&#x6570;&#x7EC4;</p>
<pre><code>            var reg = /&#x5929;/g;
            console.log(str.match(reg));
            console.log(str.search(reg));
            console.log(str.split(/&#xFF0C;/));
</code></pre><h1 id="&#x9AD8;&#x7EA7;&#x5E94;&#x7528;-&#x53CD;&#x5411;&#x5F15;&#x7528;">&#x9AD8;&#x7EA7;&#x5E94;&#x7528; =&gt;&#x53CD;&#x5411;&#x5F15;&#x7528;</h1>
<p>&#x5982;&#x679C;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x7528;&#x5230;&#x5339;&#x914D;&#x7684;&#x6570;&#x636E;</p>
<p>&#x53EF;&#x4EE5;&#x5728;&#x5339;&#x914D;&#x6A21;&#x5F0F;&#x7684;&#x6570;&#x636E;&#x4E0A;&#x6DFB;&#x52A0;&#x4E00;&#x4E2A;&#x5C0F;&#x62EC;&#x53F7;</p>
<p>&#x5C0F;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x503C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;$&#x52A0;&#x6570;&#x5B57;&#x6765;&#x62FF;&#x5230;&#x7B2C;&#x4E00;&#x4E2A;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x5185;&#x5BB9;&#x7528;&#x52A0;&#x6570;&#x5B57;1&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x5185;&#x5BB9;&#x7528;&#x6570;&#x5B57;2&#xFF0C;&#x7B2C;&#x4E09;&#x4E2A;&#x62EC;&#x53F7;....3&#xFF0C;&#x4EE5;&#x6B64;&#x7C7B;&#x63A8;</p>
<p> &#x6BD4;&#x5982;</p>
<pre><code>                /(.{3})/g =&gt;&quot;$1 &quot;
                 /(.{3}(\d))/g =&gt; $1 $2
</code></pre><pre><code>            var str = &quot;123abc789&quot;;  //==&gt; 123 abc 789 
            var newstr = str.replace(/(.{3})/g,&quot;$1 &quot;);//123 abc 789 
            console.log(newstr);
</code></pre>
                    
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